Swaging die with automatic set



Sept. 7, 1943. F. R. N EWELL 2,329,076

SWAGING DIE WITH AUTOMATIC SET Filed Oct. 12, 1942 T 3nnentor 2 7/ewe// Cittornegs Patented Sept. 7, 1943 UNITED y STATES era-rem OFFlCE *'swzior Newiiira WITH Aoroivra'rro ssr v v Felix R. Nowell, v

Applicationoctob'er 12,'1942;' se1-ia1 No. 451,691 I l i I l 9 claims. (01.7 495 Thepresent-invention relatesto improvements in forging dies and more particularly tofadie i'or swaging the ends of 'drill bits and other boringtools. H I x The primary object of the invention, is to pro-.. vide a swagingand. forging die capable of being used for sharpening the cutting edges of drill bits and boring tools at the location of .the boring operation without necessitating. the boring tool being out of use-for lengthy intervals of time during sharpening or swaging. f

. Another object of. the invention is to provide a swaging die for sharpening the ends of drill swaging die as set forth in the'above mentioned objects having radially movable and adjustable die members capable of being adjusted by the insertion of holding blocks of'various sizes which maybe interchangeably used to position the radially movable die members so as to accorn-. modate drill bits of various shapes and diameters.

Another object of the invention, is to provide a swaging die having radially adjustable die members which are of a predetermined size so 1 that the outer ends will register with graduated markings formed on the base member to insure the proper positioning of the die members for a certain size drill bit. Another object of the invention is to provide a clamping ring for securely holding the radially movable die members in position after they have been adjustedto accommodate a drill bit of a certain size, thereby eliminating the use of a series of fixtures and other holding membersa's has heretofore been used.

Other objects and advantages of the inven' ti'on will become apparent during the course of the following description of the accompanying drawing wherein: 7 Y

Figure 1 is a top plan View of the swaging die of construction.

direction of the arrows and showing in detail the structural arrangement of the swaging'die set.

Figure 3 isa cross sectional iew taken onthe zig-zag line 3-3 of Figural looking in the di-. rectionof the arrows further-illustrating details Figure 4 memes; sectional view taken on line 5+4 of Figure j l lookin g in'the direction of the arrows illustrating oneoi' the adjusting bloclcs positioned in back of a radially movable die member. N I

Figure 5 is 'a ,perspective View of one of the adjustable die members. showing the configurat o -t of. I. Figure dis a transverse cross sectionalvieW similarto Figure 2illustratingfa drill bit i ngposition. for swaging and the manner in which the adjustable [die members.are located. Figure 7 is a side elevati-onal yiewshowinga ortion of a drill bit and illustrating the shape of the cutting teeth thereof, I

Figure .8 v "is a bottom plan view i the dril bit.

shown in Figure 7 illustrating .the' cutting teeth or surfaceson the end thereof, and

' Figure S isa side eleyational view of theiswa'g me, ef' ns. the. sam i po on: on th loweriend of a. drill fduring .s'wa ging'operation. In fthe, drawing, wherein .rorfthe purpose of illustrating the invention and wherein like refer.- ence. characters will be; employed to designate likeparts throughout the same, the reference character 5. Will generally be employedftodesi'gnfate abase formedfof a block of metal .of polyge onal shape and s aidbase includes a bottom wall '5 and amp .wau r ivhicn .are subs'tantially flat so that the'bottoni Wa'll'S may rest upon asuitable support during the 'swaging operation;

.Formed in' the top wall 1 is a cruciformgroove including radially extending portions ,8 formed by converging side walls 53 asshown in Figures 3v and 4. The converging. walls 9. intersect as at mas is clearly shown in Figure 1. I

islidably received in each' of the .V-shaped grooves E' isan adjustable die member M. as shown in Figure 5 and the die-members are formed; of a block of. metal having ,converging walls l2 forming a v shaped block complementary'withthe V-shaped groove 9,so as toTfreely slide therein during adjustment. Theinner'wall of .eachadjustable; die member ii is undercut asat l3 and extendsxupwardly asat'M to a embodying the invention showing th -parts in theirass'embled relation. g 1 Figure 215 a transverse cross sectional :VieW taken on line 2--2 or Figure 1 looking in the v rounded portion. [5, thereby providing a nose. 'for engaging the portion of the drill bit ,above thecutting teeth. The top Wall lot the block Eis provided with a series; oi graduation marks The V-shaped grooves-8 terminate a slight dis- I tance short of the edge wall of the block 5 in a vertical wall I! which is adapted toform an abutting wall for a series of interchangeable blocks [8 of various widths.

I8 is provided with a laterally extending arm l8 having an aperture for being received on a hinge pin IS the ends of which are supported by up Each of the blocks the drill D, the round nose portions 14 and I5 of the die members II will engage the vertical wall of the drill thereby preventing lateral movement of the drill during swaging. Simultaneously, the

may now be'suspende'd from suitable well rigging equipment and jarredby'imparting sudden up and down movement thereto so that the end of the drill will assume the same profile characteristics as the grooves 8 and beveled end portions l3 of thedie members ll.

, If desired, the die set may be used for. forming the'teeth on new drills by simply inserting a bar standing lugs I8 formed integral with the top wall 5. It is intended to provide a set of interchangeable graduated blocks [8 of different thickness in sets of four, so that the adjustable die members Il may be set to a position determined by the thickness or size of the blocks IS. The blocks IB are provided with converging lower alls 19 which engage the converging walls 9 of the groove 8 so that the major portion of each of the blocks [8 will abut the ends of the adjustable die members II. By merely swinging the blocks IS on theirhinge connections l8 into and out of the grooves 9, the die members may beset to any desired position.

A clamping ring 20 is adapted to be fastenedto the block 5 by means of bolts 2] extending through openings therein as at 22 so thatthe lower threaded ends of the bolts will be received in threaded openings 23 formed in the block are The clamping ring 20 is adapted to, engage the 1 upper surfacesof the adjustable die members ,II to prevent the vertical movement thereof during the swaging operation. Formed integral with the base'5 and extending laterally from, opposite side walls thereon are outwardly directed lugs 30 to which is pivotally fastened as at 3|, an upwardly swinging arm 32 having formed on the upper end thereof; a'semicircul'ar collar,33 adapted to en circle .the drill D. Clamping bolts 34 extend through ears 35 for securely holding the base 5 p on the end of the drill D.

' In use, the drill D is first heated to a forging temperature and the hinged blocks iBareswung on their hinge pintles to allow the die member I I to be moved radially as far as possible. The end of the drill D is then inserted so that'the teeth T are in registry with the grooves 8, as is shown of stock having one end heated to a forging temperature so that the metal will flow into conformity with the V-sh'aped grooves 8 and underout beveled edge l3 when a series of blows are struck on the upper end oflthe bar stock by a relatively heavy hammer.

It is to be understood that the form of the in- Vention herewith shown and described is to be taken as a preferred embodiment of the same, andthat various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of thesubjoined claims.

What I claim is:

1. A swaging die, comprising a base having a cruciform groove in its'top wall, die members radially movable in the groove, interchangeable blocks for setting the die members' in a predetermined position and a circular retaining member engaging the die membersjfor anchoring the die members in an adjusted position.

2. A swaging die, comprising a base having a cruciform groove formed in the top wall adapted to conform to the cutting edge of a drill bit, a series of die members movably mounted in the extension of said groove, interchangeable blocks positioned between the ends of the die members and the outer ends of the groove extensions and a retaining member for anchoring the die members inan adjusted position.

3. A swaging die, comprising a base having a cruciform groove of V-shaped cross section adapted to shape and configure the cutting end of a .drill bit, radially movable die members in the arms of said grooves, interchangeable adjusting blocks for said die members and a circular retaining member for anchoring said die members in a predetermined adjusted position.

in Figures '2 and 6. After the drill D has thus a suitable wrench to frictionally clamp thesestions 33 in place.

Having thus fastened the device in place, the

die members are moved inwardly to a predeter- -mined position so that one or all of the hinged graduated blocks l8 may be swung to a position .36 are now drawn tightly in place by means of l in back of the die members to retain them-in their adjusted position. To insure centering of 4. A swaging die, comprising a base having a cruciform groove of V-shaped formation in its top wall, the intersecting portion of said groove die members adjustably mounted in the groove and interchangeable size blocks interposed between thejend walls of the groove and said die members for holding the die members in an adjusted position.

5. A swaging die, comprising a base having a cruciform groove of V-shaped cross section adapted to receive and shape a cutting tool When presented to the intersecting portion of said cruciform groove, cooperating die members radially movable in the cruciform groove, interchangeable adjusting blocks mounted in back of the die members and a retaining memberfor holding the die members in an adjusted position.

6. A swaging die, comprising a base having a drill bit engaging surface to impart a definite contour to the drill bit end, cooperating die members carried by the base having beveled surfaces for imparting a profile to the edges of said drill bit and interchangeable adjusting blocks positioned in back of the cooperating die member to hold the die member in an adjusted position.

7. A swaging die, comprising a base having surfaces adapted to be engaged by a drill bit when heated to a forging temperature to shape and configure said drill bit surfaces to form cutting edges, cooperating die members carried by the base for engaging the outer edges of the drill bit cutting surface, said die members having undercut ends for allowing the metal on the cutting edges of a drill bit to flow therebeneath, size blocks interchangeably positioned between the outer ends of said die member and said base and a retaining ring engaging the upper surfaces of said die members for securing the die members in an adjusted position.

8. A swaging die, comprising a base having a drill bit engaging surface for imparting a definite shape to the end of the drill bit, movable cooperating die members carried by the base adapted to provide a drill bit edge forming surface, interchangeable adjusting blocks for retaining the die members in a preset position and a retaining ring clampingly engaging the top wall of the cooperating die members.

9. A swaging die, comprising a base having a cruciform recess defining radially extending grooves in the top wall thereof providing a cutting tooth shaping portion for drill bits, said grooves being V-shaped in cross-section to impart a definite shape to the cutting teeth, cooperating die members movably mounted in said grooves having beveled inner ends for imparting a definite shape to the outer edges of the 

